Stone-planing machine



(No Model.) 4 Sheets-Sheet 1.

J. MANN.

STONE PLANING MACHINE.

No. 591,411. Patented Oct. 12,1897.

I U I 4 Sheets-Sheet 2.

(No Model.)

J. MANN.

STONE PLANING MACHINE.

Patented 001;. 12,1897

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(No Model.)

4 Sheets-Sheet 3. J. MANN. TONE PLANING. MACHINE.

N0. 591,411. Patented Oct. 12,1897.

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(No Model.) 4 sheetssheet 4. J. MANN.

STONE PLANING MAGHINE.

No. 591,411. Patented Oct. 12,1897.

UNITED STATES PATENT OF ICE.

JAMES MANN, OF PHILADELPHIA, PENNSYLVANIA.

STONE-PLANING MACHINE.

SPECIFICATION forming part of Letters Patent No. 591,411, dated October 12, 1897. Application filed February 5, 1897. serial No. 622,100. (No model.)

To all whom 'it may concern:

Be it known that l, JAMES MANN, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements, in Stone-Planing Machines, of which the following is a specification.

My invention relates to improvements in stone-working machinery; and the object of my invention is to furnish a machine for planing, cutting, or forming segmental blocks of stone, or for cutting upon the face of a segmental block of stone a series of concentric circular lines or grooves.

In the accompanying drawings, forming part of this specification, and in which similar letters of reference indicate similar parts throughout the several views, Figure 1 is a perspective view of my improved stone-cutting machine, part of the framework being broken away; Fig. 2, a plan of the machine, the upper part of the framework being removed; Fig. 3, a front elevation of the machine; and Fig. 4., a side elevation of the machine, looking toward the tool-holder from the left of Fig. 1.

A is the frame of the machine; B, the bedplate, which is made in three pieces, the central one 0 of which is removable, for a purpose hereinafter described.

D are key-holes in the bed-plate adapted to receive keys E, which, together with wedges F, hold the block of stone G in place while being cut or shaped by the cutting-tool.

H is a circular segmental track or guide upon which the carriage I is mounted and upon which it runs; J, a segmental rack forming part of the casting of carriage I or secured thereto.

K is the tool-holder slide, one end of which is vertically adjustable on the carriage I, the other end being vertically adjustable on a vertical post L, which is concentric with the track or guide 1-1 and with which or about which the slide K may turn.

M are vertical adjusting -screws passing through the casting which carries the horizontal tool-slide K and engaging threads in this casting.

N are bevel-gears on screws M; O, bevelgears meshing with gears N; P, a shaft on which gears O are carried; P, bearings in which shaft P is supported and turns; R, a hand-wheel by means of which said shaft P and gears 0 may be rotated in order to turn screws M to adjust the tool-holder carrying slide K and the tool-holder vertically.

S is the tool-holder; T, a screw by means of which the tool-holder may be moved in or out for adjustment. The tool-holder and the means for adjusting it are of the well-known form andwill not require detailed description, it being understood, ofcourse, that'the tool-holder is vertically adjustable independently of the guide K.

U is a circular guide against which the top of ca'rriage'I bears. This guide is suitably carried by the vertical part of the framework A, and its purpose is to prevent the carriage from lifting from the guides H when the tool V is taking a heavy cut.

a is a pinion meshing with the teeth of segmental rack J; b, a pinion fast to shaft of pinion a, which meshes with a gear a, which meshes with a gear 01, Fig. 2, fast to a shaft which carries two fast pulleyse f and a loose pulley g.

h t are belts, one straight and the other crossed, the first of which is adapted to engage alternately fast pulley e and loose pulley g and the other the fast pulley f and the loose pulley g.

j is a shifter by means of which the belts are shifted from the fast to the loose pulleys, and vice versa. This shifter is operated in the manner usual in planing-machinesthat is, a trigger It (shown in dotted lines, Fig.2) is engaged by stops Z Z, carried by the moving carriage, to throw the shifter either in or out. The belts h 1; are driven from a counter-shaft (not shown) in the usual manner.

If desired, the machine may be furnished with two tool-holders, as shown in Fig. 2, the inner one S being adapted to cut circular lines or grooves of small radius and the outer one S lines or grooves of greater radius. They may both be operated at one time on the same or upon separate blocks of stone. When used upon separate blocks of stone, the central portion 0 of the bed B would preferably be removed in order that the operator might stand between the blocks to rapidly and accurately adjust the cutters as might be necessary. \Vhen two toolholders are used, each one, as usual, has a separate operatingscrew T for adjusting it horizontally.

In addition to the tool-holders carried by the horizontal bar K other tool-holders, as 8*, Fig. l, may be carried by carriage I, in order to plane the edges of the block.

Having thus described my invention, I clai1n 1. In a stone-planing machine, in combination, a circular segmental track or guide, a carriage mounted and adapted to be reciprocated on said track or guide, a vertical post placed concentrically with said track or guide, a horizontal tool-carrying guide one end of which is carried by said carriage and the other by said post, a tool holder or holders carried by said guide horizontally adjustable thereon, means for vertically adjusting said horizontal guide upon said central post and said car-T riage, a stationary bed-plate adapted to hold the stone to be out, and means for reciprocating said carriage and its connected parts.

2. In a stone-planing machine, in combination, a circular segmental track or guide, a carriage mounted and adapted to be reciprocated 011 said track or guide, a horizontal toolcarrying guide one end of which is carried by said carriage and the other by said post, a. tool holder or holders carried by said guide and horizontally adjustable thereon, means for vertically adjusting said horizontal guide on said central post and said carriage, a stationary bed-plate adapted to hold the stone to be cut, a circular segmental rack, concentric with said segmental track or guide, carried by said carriage, a pinion gearing with said rack, and means for driving said pinion, all substantially as and for the purposes set forth.

3. In a stone-planing machine, in combination, a segmental track or guide, a carriage adapted to travel on said track or guide, a segmental rack attached to or forming part of said carriage, a vertical post placed concentrically with said track or guide, a horizontal tool-holder guide one end of which is vertically adjustable on said post and adapted -to turn with or around the same, and the other end of which is vertically adjustable on said carriage, a tool holder or holders horizontally adjustable on said guide, means for JAMES MANN.

W'itnesses:

CHRISTOPHER FALLON, CHARLES A. BUTTER. 

